Ventilator.



M. B. MOYER.

VENTILATOR.

APPLICATION FILED MAR.26. 19m.

1 ,284,427. Patented Nov. 12, 1918.

2 SHEETS-SHEET I- M. B. MOYER.

VENTILATOR.

APPLICATION FILED MAR. 26. 19m.

1 ,28454271 Patented No v. 12, 1918.

2 SHEETS-SHEET 2- MALCOLM B. MOYER, OF MONTEVIDEO, MINNESOTA.

VENTILATOR.

Application filed March 26, 1918.

To all whom it may concern:

Be it known that I, MALCOLM B. MOYER, a citizen of the United States,residing at Montevideo, in the county of Chippewa and State ofMinnesota, have invented certain new and useful Improvements inVentilators; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention has for its object to simplify and cheapen the constructionof ventilators such as that disclosed by my U. S. Patent No. 1246774 ofNov. 13, 1917, and at the same time to so construct the device as topermit it to be readily knocked down and compactly crated for shipment.

With the foregoing general object in view, the invention resides in thenovel features of construction to be hereinafter fully described andclaimed, the descriptive matter being supplemented by the accompanyingdrawings which form a part of this specification and in which:

Figure 1 is a central vertical section of one form of the ventilator;

Fig. 2 is a top plan View of the form of the invention shown in Fig. 1;

Fig. 3 is a detail top plan view showing the manner in which a largertop or bottom plate may be held in place by the bracket plate shown inFigs. 1 and 2;

Fig. 4 is a perspective View showing a modified form of bracket plate;and

Fig. 5 is a detail top plan view showing the manner of holding a largertop or bottom plate by the bracket plates of the form shown in Fig. 4.

In Figs. 1, 2 and 3 of the drawings above briefly described, the numeral1 designates a continuous vertical wall formed of sheet metal andpreferably though not necessarily of circular shape, the inner side ofsaid wall having secured thereto a plurality of vertical bracket plates2 which extend inwardly therefrom, preferably at right angles, the outeredges of said bracket plates having lateral flanges 3 which are rivetedto the wall 1, while the upper and lower ends of said plate are formedwith V-shaped notches 4 and 5 respectively, said notches being locatedadjacent the inner edge of the plates.

A top plate 6, in most cases of cone shape, rests on the upper ends ofthe bracket plates 2 with its edge spaced from the wall 1 andSpecification of Letters Patent.

Patented Nov. 12, 1918.

Serial No. 224,837.

received in the upper notches 1. The lower ends of the aforesaid plates2 rest on an inverted cone-shaped bottom plate 7 whose edge is spacedfrom the wall 1 and received in the notches 5, said bottom plate havinga ventilator pipe opening 8 into which the upper end of a verticalventilator pipe 9 extends, said pipe having an external bead 10 or othersuitable means for supporting'the bottom plate. A bridge 11 extendsacross the pipe 9 and a vertical tie rod 12 extends from this bridge tothe top plate 6 to tie the several parts of the ventilator together andto secure the same upon the pipe 9. l/Vhen this bolt is removed howeverthe device may be knocked down and compactly crated for shipment.

In some instances it is advisable to use top and bottom plates of agreater diameter than in others, and in order to permit this-changewithout otherwise altering the construction of the ventilator, thebracket plates 2 are formed of ductile or resilient metal so that theymay be bent or sprung laterally as indicated in Fig. 3, thus bringingtheir notches 4t and 5 closer to the wall 1 to accommodate the largertop or bottom plates. When the bracket plates 2 are thus sprung, theyare placed under tension and it will be obvious that this tension willbe exerted to effectively grip the bottom and top plate to preventpossible rattling under the action of wind.

In the form of the invention shown in Figs. l and 5, the bracket plates2 are riveted along theirvertical centers to the wall 1 as shown at 13,the ends 14 of said plates being bent laterally inward into divergingrelation and having near their inner ends upper and lower notches 1 and5' similar to those above described. The plates 2' are also of resilientor ductile material in order that their ends 1 1 may be moved toward oraway from each other (see Fig. 5) to accommodate top and bottom platesof different diameters.

Both forms of the invention are extremely simple and inexpensive, may becompactly crated for shipment, easily set up for use and are highlyefficient when once installed. Regardless of the direction in which theair currents may be moving, an upward suction will be created throughthe ventilator pipe 9 much the same manner as set forth at length in thepatent above referred to.

Since probably the best results are obtained from the several detailsshown and described, these details are preferably employed, but withinthe scope of the invention as claimed, numerous minor changes may wellbe made.

I claim:

1. A ventilator comprising a continuous wall of uniform diameterthroughout its height, the upper and lower ends of said wall being openand being symmetrical, a plurality of vertical sheet metal bracketplates of rectangular shape extending inwardly from said wall and havingtheir straight outer edges bent laterally throughout their lengths andsecured thereto, the upper and lower extremities of said plates eachhaving a notch, said notches being located at the inner corners of saidplates and the upper and lower ends of the latter being symmetrical, abottom plate having a ventilator pipe opening, the edge of said bottomplate being received in the lower notches of the bracket plates, andatop plate having its edge disposed in the upper notches of said plates.

2. A ventilator comprising a top and a bottom plate, the latter having aventilator pipe opening, a continuous wall surrounding said plates andspaced from the edges thereof, and a plurality of vertical resilientbracket plates secured to said wall and extending inwardly therefrom,said bracket plates having notches receiving the edges of said top andbottom plates and being sprung to tangential positions thereby to placethem under tension and to utilize such tension to retain said bracketplates yieldably against said top and bottom plates.

3. A ventilator comprising a continuous vertical wall, a plurality ofvertical bracket plates secured at their vertical centers to the innerside of said wall, the ends of said bracket plates being bent laterallyinward into diverging relation and having angular notches in their upperand lower edges, a top plate resting on said bracket plates with itsedge spaced from said wall and received in the upper. notches, and abottom plate upon which said bracket plates rest, the edge of saidbottom plate being spaced from said wall and received in the lowernotches, said bottom plate having a ventilator pipe opening.

4. A structure as specified in claim 3, said bracket plates beingductile whereby they may be bent or sprung toward or away from eachother to vary the distance between their notches and said wall,according to the size of said top and bottom plates.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses.

MALCOLM B. MOYER. Witnesses W. T. OLIVER, CHAs. A. Boss.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

